单项选择题

Which of the following is TRUE

A. Man is more color-conscious than the honey-bee.
B. The honey-bee is blind to red.
C. The honey-bee can see far more colors.
D. Man is sensitive to the ultra-violet.

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单项选择题

A. He is afraid he won’t be chosen.B. The boss hasn’t decided where to go.C. Such a trip is necessary for the company.D. It’s not sure whether there is a trip.

A. He is afraid he won’t be chosen.
B. The boss hasn’t decided where to go.
C. Such a trip is necessary for the company.
D. It’s not sure whether there is a trip.

单项选择题

A. You are welcome. B. He’s nice.C. It’s perfect. D. It’s two o’clock.

A. You are welcome.
B. He’s nice.
C. It’s perfect.
D. It’s two o’clock.